memchr

Header: <string.h>

  1. Finds the first occurrence of (unsigned char)ch in the initial count bytes (each interpreted as unsigned char) of the object pointed to by ptr.

# Declarations

void* memchr( const void* ptr, int ch, size_t count );

/*QVoid*/ *memchr( /*QVoid*/ *ptr, int ch, size_t count );

(since C23)

# Parameters

# Return value

Pointer to the location of the byte, or a null pointer if no such byte is found.

# Example

#include <stdio.h>
#include <string.h>
 
int main(void)
{
    const char str[] = "ABCDEFG";
    const int chars[] = {'D', 'd'};
    for (size_t i = 0; i < sizeof chars / (sizeof chars[0]); ++i)
    {
        const int c = chars[i];
        const char *ps = memchr(str, c, strlen(str));
        ps ? printf ("character '%c'(%i) found: %s\n", c, c, ps)
           : printf ("character '%c'(%i) not found\n", c, c);
    }
    return 0;
}

# See also